| Title | Late-Pleistocene Geology and Structural Control of the Karymsky Volcanic Center Geothermal Fields, Kamchatka: Evidence for Evolution of Magmatic System |
|---|---|
| Authors | Vladimir L. Leonov, Yelena N. Grib |
| Year | 2005 |
| Conference | World Geothermal Congress |
| Keywords | Kamchatka, volcanic center, geology, caldera, pyroclastic flow, geothermal system |
| Abstract | The Karymsky volcanic center - a group of volcanoes, calderas, and maars - are located in the central part of the Eastern Volcanic Belt of Kamchatka. It was constructed since the Pliocene, and a voluminous eruption of pyroclastic flows and ash-fall deposits were in Late Pleistocene. In 2003 works in area of the Karymsky geothermal system belonging to the Karymsky volcanic center have been completed. Works were carried out with the purpose of studying magmatic supply system of volcanoes, for reception of the new data on the magmatic chambers, their interrelation, and a role in a thermal feed of geothermal system. The lead works have allowed specifying essentially history of volcanic development in area for last 200 thousand years. The new geological map is made; volumes of pyroclastic deposits, connected with formation separate calderas are appreciated. Structural conditions of location Eastern Kamchatka's high-temperature hydrothermal systems and Karimskaya hydrothermal system are analysed. It is shown that the main structural elements determining the position of high-temperature hydrothermal systems are faults. Magma and hydrothermal fluids are constantly rising along them and complex volcanic structures on the surface are formed. Thermal manifestations are usually located within boundary of such structures and around them. |